The utility model provides a but pull -plug type miniature circuit breaker device is including base, conductive copper column, breaker module, control switch, electric conduction jacks hole, apron, pressing strip, automatic hank, joint strip, fixed plate, through -hole and sheet rubber. Use a but pull -plug type miniature circuit breaker device, be connected the wire that extends on the electric energy meter with the wire that passes automatic hank to adjust pressing strip's the length that exposes, cover wiring department, then through fixed plate fixing device, make copper post and jack connection at last. A but pull -plug type miniature circuit breaker device, its reasonable in design, easy operation, safe and reliable through the electric conduction jacks hole high -speed joint on the conductive copper column with on the breaker module and the base, has realized the quick operation, utilizes the line ball board to cover the wire simultaneously, improves inner sealing nature, it is ageing to delay inner line, improves life.